*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
html, body{
    height: 100%;
}

body{
    background-color: #101722;
    font-size: 14px;
    color:#f5f5f5;
    font-family: "宋体";
}

.xy{
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}
.center {
    left: 50%;
    transform: translateX(-50%);
}
.middle {
    top: 50%;
    transform: translateY(-50%);
}

.w-100{
    width: 100%;
}
.h-100{
    height: 100%;
}

.f-14{
    font-size: 14px !important;
}
.f-16{
    font-size: 16px;
}

.f-20{
    font-size: 20px;
}
.f-24{
    font-size: 24px;
}

.m-l-10{
    margin-left: 10px;
}
.m-l-15{
    margin-left: 15px;
}
.m-l-20{
    margin-left: 20px;
}

.m-l-30{
    margin-left: 30px;
}

.m-t-10{
    margin-top: 10px;
}

.m-t-15{
    margin-top: 15px;
}
.m-t-20{
    margin-top: 20px;
}
.m-t-30{
    margin-top: 30px;
}
.m-t-40{
    margin-top: 40px;
}
.m-t-50{
    margin-top: 50px;
}

.color-f5f5f5{
    color: #f5f5f5;
}
.color-fff{
    color : #fff;
}
.color-a9abaf{
    color: #a9abaf;
}

.w-100 {
    width: 100%;
}

.h-100 {
    height: 100%;
}

.relative{
    position: relative;
}
.absolute{
    position: absolute;
}

.block {
    display: block;
}

.flex {
    display: flex;
}

.text-center{
    text-align: center;
}

.overflow{
    overflow: hidden;
}
.pull-left{
    float: left;
}
.pull-right{
    float: right;
}